I follow the idea that if you leave the class with your voice hoarse or throat sore then you are doing something wrong in class.
Is it because you are yelling at students? (you shouldn't need to) Yelling to get attention? (find a better method or attention getter or strategy). Is it because you are talking a lot (again, you shouldn't be, in a student-centered classroom).
If it's not related to illness or similar, I use the time that my throat hurts as a reminder that next lesson I need to reinforce my expectations and be more strict with my behavior management.